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Hydraulic Power Steering Circuit

On manual steering system, the gear box will multiplies the steering wheel torque input to create greater torque to the steering shaft. The steering shaft then transmits the torque to the steering arm to turn the wheel through the steering linkage. The hydraulic power steering will provide a torque into this basic manual steering system.

Manual power steering system with hydraulic boost

The mechanical hydraulic servo system can be applied to the steering linkage on the basic manual steering system. The steering valve will be actuated by the steering wheel movement, the steering valve will flows the fluid according to the steering wheel direction through valve spool.

Semi integral hydraulic power steering system

The integral hydraulic power steering has a built in hydraulic servo system on the steering gear. The steering shaft will actuated steering valve to control hydraulic cylinder movement. The hydraulic cylinder actuator then transmits the thrust to the steering shaft.